Responses
+ felt like a delayed speech development to me. It ain't normal for a preschooler beyond 3 years old to still find it difficult to pronounce certain letters. I say normal because it is on the level of uncommon that people obtain speech impediments such as articulation disorders or of sort at such young age.

I don't like the chapter with the tutor. She literally came off that situation unscratched and less punished. In no way does physical punishment nor inflictions a way for educating anyone. I stopped reading immediately.
Yes, Nema is apparently trying to overcome her (?) or whatever, but as a parent, how can you let someone who repeatedly harmed your daughter and what? Scolded the lady and let her teach again. That's unrealistically "understanding" of their side, giving second chances on someone who one-sidedly inflicted pain on their daughter. Everything was wrong in that chapter. Nema's mature reaction for a 4-year-old (not suspicious for the readers, but should be for her family), her parents leniency over a clear malpractice, and the tutor's way of educating a preschooler.
Wdym the mother asked her 4-year-old daughter that couldn't even speak clearly, about how she'll "win over" the tutor? Screw that perfect lady. Someone would be way better than her. ヽ(`Д´)ノ